uniapp实现下拉过滤查询列表

 <picker bindchange="bindPickerChanges" value="{{selectedIndex}}"
                range="{{pickerArray}}"
                range-key="name">
          <view class="area-select">在线状态：
              <label for="">{{pickerArray[selectedIndex].name}}</label>
              <image src="/img/arrow_down.png"></image>
          </view>
        </picker>

page{
data{
 pickerArray: [{
      value: 0,
      name: '全部'
    },{
      value: 1,
      name: '在线'
    }, {
      value: 2,
      name: '离线'
    }],
    selectedIndex: 0,
	}
}

//点击事件
  bindPickerChanges: function(e) {
    this.setData({
      selectedIndex : e.detail.value,
      'query.netStatus': this.data.pickerArray[e.detail.value].value
    });
    this.onSearch();
  },

返回主页面时需要将下拉的name值进行匹配，重新刷新
下拉的状态值： ‘query.netStatus’

  onShow: function () {
    let pages = getCurrentPages();
    let currPage = pages[pages.length - 1]; //当前页面
    let districtName = currPage.data.districtName;
    let indexData = currPage.data.indexData;
    let districtCode = currPage.data.districtCode;
    let netStatus = currPage.data.netStatus;
    // debugger
    // debugger
    this.setData({
      'query.page': 1,
      'query.districtCode': districtCode || 0,
      deviceList: [],
      pickAll: false,
      districtName,
      indexData,
      'query.netStatus': this.data.pickerArray.find(it=>it.name==this.data.pickerArray[this.data.selectedIndex].name).value,
      'query.operationType': app.globalData.operationType
    })
    this.getAllDeviceAll();
    wx.stopPullDownRefresh();
    this.setLanguage();
  },